Network Bridges must be prohibited in Windows.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
WN12-CC-000004	WN12-CC-000004	WN12-CC-000004_rule		Medium

Description
A Network Bridge can connect two or more network segments, allowing unauthorized access or exposure of sensitive data. This setting prevents a Network Bridge from being installed and configured.

STIG	Date
Microsoft Windows Server 2012 Domain Controller Security Technical Implementation Guide	2013-07-25

Details

Check Text ( C-WN12-CC-000004_chk )
If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \Software\Policies\Microsoft\Windows\Network Connections\ Value Name: NC_AllowNetBridge_NLA Type: REG_DWORD Value: 0

Fix Text (F-WN12-CC-000004_fix)
Configure the policy value for Computer Configuration -> Administrative Templates -> Network -> Network Connections -> "Prohibit installation and configuration of Network Bridge on your DNS domain network" to "Enabled".